[console error] Unexpected javascript error from running app

[millyhx]

Relevant console output

Uncaught Library package:dartpad_sample/main.dart was previously defined but DDC is not currently executing a hot  reload or a hot restart. Failed to define the library., error: Library package:dartpad_sample/main.dart was previously defined but DDC is not currently executing a hot  reload or a hot restart. Failed to define the library.

When did the error happen?

Opened up DartPad, clicked on the Run button, nothing showed, then clicked on the Reload button.

Your Dart code

Used the standard template given.

What OS did this error occur on?

No response

What browser(s) did this error occur on?

No response

Do you have any additional information?

No response